If you're the admin of any of the instances listed below, you may wanna look at this link from @mastohost, as they had to block your instance.
Please c/p, as boosts won't work due to the blocking. 👍
However, this surfaces a problem I hadn't considered—masto.host is a centralized sever that can block instances. This might be a reason to hope that no one host ends up hosting too large a share of the fediverse. (I'm sure Hugo would never abuse this power, but "it doesn't matter that the system is abusable because I trust the people" is the path to ruin.)
Fosstodon is a Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.